Timestamp.h

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/*
 * Timestamp.h
 *
 * Smalltalk like class library for C++
 * Timestamp. Header.
 *
 * Copyright (c) 2005 Milan Cermak
 */
/*
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#ifndef __TIMESTAMP_H
#define __TIMESTAMP_H

#include <time.h>
#include <stlib/Object.h>

namespace Core {

class Date;
class Time;

class Timestamp : public Object
{
  protected:
    struct _timestamp_t {
        unsigned int milliseconds : 10;
        unsigned int seconds      :  6;
        unsigned int minutes      :  6;
        unsigned int hours        :  5;
        unsigned int day          :  5;
        unsigned int month        :  4;
        unsigned int year         : 28;
    } _timestamp;

  public:
    Timestamp(int month = 1, int day = 1, int year = 1900,
              int hour = 0, int minute = 0, int second = 0, int millisecond = 0);

    /* Class-accessing protocol */
    virtual String *className(void) const;

    /* Instance creating protocol */
    static Timestamp *now(void);
    static Timestamp *fromUnixTimestamp(time_t timestamp);
    static Timestamp *fromDateAndTime(Date *date, Time *time);

    /* Accessing protocol */
    virtual int month(void) const;
    virtual int day(void) const;
    virtual int year(void) const;
    virtual int weekday(void) const;
    virtual int century(void) const;
    virtual int hour(void) const;
    virtual int minute(void) const;
    virtual int second(void) const;
    virtual int millisecond(void) const;

    /* Arithmetics protocol */
    virtual Timestamp *addDays(int dayCount);
    virtual Timestamp *addMonths(int monthCount);
    virtual Timestamp *addYears(int yearCount);
    virtual Timestamp *addHours(int hours);
    virtual Timestamp *addMinutes(int minutes);
    virtual Timestamp *addSeconds(int seconds);
    virtual Timestamp *addMilliseconds(int millis);

    virtual Timestamp *subtractDays(int dayCount);
    virtual Timestamp *subtractMonths(int monthCount);
    virtual Timestamp *subtractYears(int yearCount);
    virtual Timestamp *subtractHours(int hours);
    virtual Timestamp *subtractMinutes(int minutes);
    virtual Timestamp *subtractSeconds(int seconds);
    virtual Timestamp *subtractMilliseconds(int millis);

    virtual Time *differenceFrom(Timestamp *stamp);

    /* Comparing protocol */
    virtual long hash(void) const;
    virtual bool isEqual(const Object *object) const;
    virtual bool isEqual(const Object &object) const
      { return Object::isEqual(object); }

    /* Converting protocol */
    virtual Date *asDate(void) const;
    virtual Time *asTime(void) const;
    virtual time_t asUnixTimestamp(void) const;

    /* Printing protocol */
    virtual void printOn(Stream *stream) const;

    /* Testing protocol */
    virtual bool isLeapYear(void) const;
};

};

#endif /* __TIMESTAMP_H */

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